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Efficient Blue‐Light‐Emitting Polymer Heterostructure Devices: The Fabrication of Multilayer Structures from Orthogonal Solvents
Author(s) -
Sax Stefan,
RugenPenkalla Nicole,
Neuhold Alfred,
Schuh Sebastian,
Zojer Egbert,
List Emil J. W.,
Müllen Klaus
Publication year - 2010
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200903076
Subject(s) - materials science , polyfluorene , fabrication , polymer , ethylene glycol , optoelectronics , heterojunction , diode , nanotechnology , layer (electronics) , electroluminescence , organic chemistry , chemistry , medicine , alternative medicine , pathology , composite material
An all‐solution processed organic light‐emitting diode with enhanced device efficiency based on an additional methanol‐soluble polyfluorene layer (see figure) with nonionic ethylene glycol side chains is presented. Due to an asymmetric shift of the energy levels at the polymer/polymer interface, significant efficiency enhancements were obtained.